Home / 645,352.52-890,608.23-354,976.43

Finding the Fourth Proportional to 645,352.52, 890,608.23 and 354,976.43

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Solution

The fourth proportional to 645,352.52, 890,608.23 and 354,976.43 is: 489,879.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,352.52 : 890,608.23 = 354,976.43 : x
  2. Step 2: Convert to fraction form
    645,352.52/890,608.23 = 354,976.43/x
  3. Step 3: Cross multiply
    645,352.52x = 890,608.23 × 354,976.43
  4. Step 4: Simplify right side
    645,352.52x = 316,144,925,560.98
  5. Step 5: Solve for x
    x = 316,144,925,560.98/645,352.52
  6. Step 6: Final answer
    x = 489,879.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.